<template>
  <div>
    <!-- 面包屑导航 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片视图 -->
    <el-card>
      <!-- 添加角色区域 -->
      <el-row>
        <el-col><el-button type="primary">添加角色</el-button></el-col>
      </el-row>

      <!-- 角色列表区域 -->
      <el-table :data="rolelist" border stripe>
        <!-- 展开列 -->
        <el-table-column type="expand">
          <template slot-scope="scope">
            <el-row
              :class="['rowbottom', i1 === 0 ? 'rowtop' : '', 'vcenter']"
              v-for="(item1, i1) in scope.row.children"
              :key="item1.id"
              @close="deleteTagbyId(scope.row, item3.id)"
            >
              <!-- 一级权限 -->
              <el-col :span="5"
                ><el-tag closable @close="deleteTagbyId(scope.row, item1.id)">{{
                  item1.authName
                }}</el-tag
                ><i class="el-icon-caret-right"></i
              ></el-col>
              <!-- 二级和三级权限 -->
              <el-col :span="19">
                <!-- 通过for循环嵌套渲染二级权限 -->
                <el-row
                  :class="[i2 == 0 ? '' : 'rowtop', 'vcenter']"
                  v-for="(item2, i2) in item1.children"
                  :key="item2.id"
                  @close="deleteTagbyId(scope.row, item2.id)"
                >
                  <!-- 二级权限 -->
                  <el-col :span="6"
                    ><el-tag
                      type="success"
                      closable
                      @close="deleteTagbyId(scope.row, item2.id)"
                      >{{ item2.authName }}</el-tag
                    ><i class="el-icon-caret-right"></i
                  ></el-col>
                  <!-- 三级权限 -->
                  <el-col :span="18"
                    ><el-tag
                      v-for="item3 in item2.children"
                      :key="item3.id"
                      type="warning"
                      closable
                      @close="deleteTagbyId(scope.row, item3.id)"
                      >{{ item3.authName }}</el-tag
                    ></el-col
                  >
                </el-row>
              </el-col>
            </el-row>
          </template>
        </el-table-column>
        <!-- 索引列 -->
        <el-table-column type="index" label="序号"> </el-table-column>
        <el-table-column prop="roleName" label="角色名称"> </el-table-column>
        <el-table-column prop="roleDesc" label="角色描述"> </el-table-column>
        <el-table-column label="操作" width="300px">
          <template slot-scope="scope">
            <el-button size="mini" type="primary" icon="el-icon-edit"
              >编辑</el-button
            >
            <el-button size="mini" type="danger" icon="el-icon-delete"
              >删除</el-button
            >
            <el-button
              size="mini"
              type="warning"
              icon="el-icon-setting"
              @click="showSetRightDialog(scope.row)"
              >分配权限</el-button
            >
          </template>
        </el-table-column>
      </el-table>
    </el-card>

    <!-- 分配权限对话框 -->
    <el-dialog
      title="分配权限"
      :visible.sync="showSetRightDialogVisible"
      width="50%"
      @close="setRightDialogClosed"
    >
      <!-- 树形控件 -->
      <el-tree
        show-checkbox
        :data="rightsList"
        :props="treeProps"
        node-key="id"
        default-expand-all
        :default-checked-keys="rightKey"
        ref="treeRef"
      ></el-tree>
      <span slot="footer" class="dialog-footer">
        <el-button @click="showSetRightDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="allotRights">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default ({
  data() {
    return {
      // 所有角色列表数据
      rolelist: [],
      // 分配权限的显示和隐藏
      showSetRightDialogVisible: false,
      // 数据接收源
      rightsList: [],
      // 树形控件的属性绑定对象
      treeProps: {
        children: 'children',
        label: 'authName'
      },
      // 树形控件默认选中ID值数组
      rightKey: [],
      //角色id
      roleId: ''
    }
  },
  created() {
    this.getRolesList()
  },
  methods: {
    // 获取所有角色列表数据
    async getRolesList() {
      const { data: res } = await this.$http.get('roles')
      if (res.meta.status !== 200) {
        return this.$notify.error('数据获取失败')
      }
      this.rolelist = res.data
    },
    // 删除tag标签
    async deleteTagbyId(role, rightId) {
      // 点击弹出删除选项框
      const confirmResult = await this.$confirm('此操作将永久删除该文件, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)
      // 取消 cancel  确认 confirm
      if (confirmResult !== 'confirm') {
        return this.$notify.info('已取消操作')
      }
      const { data: res } = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
      if (res.meta.status !== 200) {
        return this.$notify.error('删除数据失败')
      }
      role.children = res.data
    },
    // 分配权限
    async showSetRightDialog(role) {
      // 拿到role.id
      this.roleId = role.id
      // 再打开之前需要先把数据获取过来
      const { data: res } = await this.$http.get('rights/tree')
      if (res.meta.status !== 200) {
        return this.$notify.error('获取权限列表失败')
      }
      // 获取到的数据权限保存在rightslist
      this.rightsList = res.data
      console.log(this.rightsList);
      // 通过递归的形式获取到ID值，在赋予rightKey
      this.getrightKey(role, this.rightKey)
      // 点击打开对话框
      this.showSetRightDialogVisible = true
    },
    // 通过递归获取到三级权限下ID节点，赋予给rightKey
    getrightKey(node, arr) {
      // 如果当前node 不包含children属性，则是三级节点
      if (!node.children) {
        return arr.push(node.id)
      }
      // 如果不是三级节点，通过递归的方法获取到三级节点，还需要通过node.children获取到三级节点传出去
      node.children.forEach(item => {
        this.getrightKey(item, arr)
      });
    },
    // 监听当前权限对话框，重置分配权限
    setRightDialogClosed() {
      this.rightKey = []
    },
    // 点击为角色分配权限
    async allotRights() {
      const keys = [
        ...this.$refs.treeRef.getCheckedKeys(),
        this.$refs.treeRef.getHalfCheckedKeys()
      ]
      // 在通过join将keys拼接成字符串数组
      const idStr = keys.join(',')
      console.log(idStr);
      // 再调用接口
      const { data: res } = await this.$http.post(`roles/${this.roleId}/rights`, { rids: idStr })
      if (res.meta.status !== 200) {
        return this.$notify.error('权限分配出错')
      }
      this.$notify.success('权限分配成功')
      this.getRolesList()
      this.showSetRightDialogVisible = false
    }
  }
})
</script>

<style lang="less" scoped>
.el-tag {
  margin: 10px;
}
.rowtop {
  border-top: 1px solid #eee;
}
.rowbottom {
  border-bottom: 1px solid #eee;
}
.vcenter {
  display: flex;
  align-items: center;
}
</style>